Hy. I have found a different solution for c4480 "incopatible cartrige". it worked for me so i hope it works for you to

Steps:

1. Press X+power at the same time2. Press BLUE, GREEN, GRAY3. press BLUE until you see "INFORMATION MENU"4. press OK5. Press Blue until you see "CHECKSUM FOR RELOCK DATA INPUT"6. OK7. Press X until you exit all menius8. When promted for aliement cancel it with X.It should bypass the error

Step 1: Turn printer on -- open front door.
Step 2: Tilt cartridge down in front and remove cartridge.
Step 4: Refill cartridge with ink per instructions on refill kit.
Step 5: Reinstall cartridge by reverse of step 2, then 1.
Works for me -- I refill 6 or more times before replacing the
cartridge.
HP 1401 PSC